Announcements

• Respect the privacy of participants
• Meetups are never recorded. We want everyone to feel comfortable participating and discussing the scheduled topics, anonymously if they wish

Acknowledgements

• Thanks to Vinteum and Bitcoin Paraguay for the support

Warmup

• Puzzle 69 solved and stolen
  • Overview
• Peach GroupHug
• BIP30 consensus failure vulnerability
  • Removal PR

Bitcoin

• BIP 54: Consensus Cleanup
  • Interview with Antoine Poinsot
• Against Allowing Quantum Recovery of Bitcoin
• SwiftSync: Speeding up IBD 5x

OP_RETURN / Filters Drama

• Introduction and Summary
• Antoine Poinsot’s comment
• Proposed PR
  • New one keeping the flags
• Attempt to introducing more filters
• Introduction of -datacarrier
• full-rbf by default
  • Temporarily disable -mempoolfullrbf for the main chain
  • Flag removal
• Why would anyone use OP_RETURN over inscriptions
• “It’s impractical to prevent 32-byte spam from abusing p2*h outputs”
• What’s the largest size OP_RETURN payload ever created?
• tx-pigeon 🕊️
• Someone inscribed this 3.7MB bitcoin music track via slipstream
  • Tx on Mempool Space
• First Taproot Annex usage
  • Second
  • Code
• Vision of mempool simplification
• Rage against Bitcoin Core

Bonus Topics

Mining

StratumV2

• Hashpool 0.1
• Demand Pool

Lightning Network & L2

• Make the payment secret mandatory for BOLT11
• Spark live on mainnet